| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] used for [det] [noun sg] | 12 |
|
| 2 | been used for [det] [noun sg] | 12 |
|
| 3 | [been] used for this [noun sg] | 6 |
|
| 4 | [been] used for [det] purpose | 5 |
|
